Add a limitation for admins to not be able to /tp another player to them.
For instance if you want an admin to only serve as a spectator and nothing else, there is no reason you would need that person to be able to tp another player to them. In this scenario, they have permanent vanish, and cannot interact with any items/containers or do damage using limited-admin. They would only ever need to tp to another player covertly. The feature of teleporting another player to them can be abused.
I'm suggesting to add an option in the config to disallow /tp'ing a player to a target,
or an oxide permission that restricts that functionality. something like o.grant group trialadmin nteleportation.disallowsending